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J.B.GAED1NER AND EDWAED H. HYDE, DE SPRINGFIELD, MASSACHUSETTS.

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@te Saguaro maar tr im tigen trttas prient :un mating part nf tige' same.

TO ALL WHOM ITv MAY OONCERN:

Be it known that we, J. B. GARDINER and E. H. HYDE,-both et Springfield, Hampden county, Gommonu wealth of Massachusetts, have invented certain new andv useful Improvements in Steam-Pumps, of which the following is a full and exact description, reference being had t'o the accompanying drawings, and to letters of reference marked thereon.

This invention consists in the arrangement of a slide-valve, operated by two steam-pistons attached together, and moved by steam let on at either end, by means of. a secondary valve, operated directly from asteam-piston, A. To this steam-piston maybe attached the plunger of a single-acting or the piston of a double-acting pump.

In the 'drawings accompanying this specification is showna diagram ofl the construction of our improved pump. These improvements we will now more fully describe.

4The pump-cylinder C is formed like that of a common plunger-pump, having cheek-.valves attached at a a', as ordinarily arranged. On the plunger B is cast the piston A, a stuffing-box, b, being interposed between the water-cylinder C and the steam-cylinder D, Fastened to the piston A is the valve-rod c, which at its upper `end enters the interior of the lsmall valve E, and moves the same, when the'piston works up and down, bythe head d striking upon each end of this valve. Ports e e are arranged in this valve E in such a manner as to communicate with portsff, communicating with the two ends of the main valve-chest O, and operating the main slide-valve H by means of the pistons Gr G', fitted in the chest at each end, and attached to the slide-valve insuch a manner, that although it is perfectly free to press down upon and form a steam-tight joint between the valveA and its seat, it is also moved by the movement ofV the two pistons G G, which are attached together by the part in which the upper part of the valve H iits. e

The operation of this invention is as follows: Steam is let ou at P, and passes into the valve-chest 0 upon the top of the slide-valve H, and also passes from the valve-chest O, through the port 7', into the secondary valve-chest R, passingupon and around the valve E. We will then suppose the part-s are in the position shown in thediagram. Steam passes in the direction of the arrows upon the valves H and E, and through the port :c upon the top of the piston A, forcing it and the plunger Bdown, and forcing out water at the lower end, through the force-check valve attached to the openings a. `When the piston arrives near the lower end of' the cylinder, the rod-.valve c, moving with it, carries the valve E, so far down in its chest that the port e is brought into communication with the portf, and steam entering through this portf, acts against the piston G', to drive the slide-valve H so far towards the opposite end ot' the chest O as to open the small exhaust-port z of'` the main vulve-chest and let out the steam 'that drives the piston. This motion of the pistonV G moves the slide-valve H, and brings the port c into communication with the steam-chest, and the port z into communica tion with the exhaust, thus reversing the movement of the piston, land causing itvto move upward, drawing up water through the suction-valve attached to the openings a. A similarv but opposite movement of the parts, when the piston arrives at the top of the cylinder, reverses the movement of the piston at the end, and thus a continual reciprocating movement of the piston is obtained.

We' do not wish to confine ourselves to the exact arrangement her'ein described, as we may use the engine as a high or low-pressure, single or double-acting, in case a. high-pressure single-acting is' used,l a. small amount ofsteam being always'belou the piston, ahd forming a spring t'o raise it, and in case a low-pressure engine is used, the steam being raised by condensation of the steam on the top of the piston, the water for condensation being taken from the pump in the manner shown in onrcaveat led August 28, 1867.'

Now, having described our invention, what we claim ,as new, and desireto secure by Letters Patent, is-- 1. The arrangement. of the valves E and H', pistons G G', ports'j.' and e, e andf, y and z, yand z', substantially as herein set forth. I l

2. The arrangement, in connection with the said valve-gear, of the valve-rod c, steam-pistou A, plunger B, and reservoir C, substantially as set forth.

- J. B. GARDINER,

EDWARD H. HYDE. Witnesses:

CHARLES P. DEANE,

R. F. HYDE. 

